Publishing & Domains
DNS Basics for Beginners
DNS connects domain names to websites, allowing visitors to access your site without needing to remember IP addresses.
Beginner
4 min read
What Is DNS?
DNS stands for Domain Name System.
It acts as the internet's directory, translating human-friendly domain names into the numerical IP addresses that computers use to communicate.
For example, when someone visits:
DNS helps locate the server where the website is hosted.
Without DNS, visitors would need to enter complex IP addresses instead of simple domain names.
Why DNS Matters
DNS is a fundamental part of every website.
It helps:
Connect domains to websites
Route email traffic
Verify domain ownership
Support third-party services
Direct visitors to the correct server
Most website launches involve at least some DNS configuration.
How DNS Works
When someone enters a domain into their browser, a DNS lookup occurs.
A simplified version looks like this:
This process typically happens within milliseconds.
Understanding Domains and DNS
A domain name and DNS are related but not the same thing.
Example:
The domain is the website address.
DNS contains the records that tell the internet where that domain should point.
Think of the domain as the street address and DNS as the directions used to find it.
What Are DNS Records?
DNS records are instructions stored within a domain's DNS settings.
Each record serves a different purpose.
Common record types include:
A Records
CNAME Records
MX Records
TXT Records
These records control how traffic is routed.
A Records
An A Record connects a domain directly to an IP address.
Example:
When someone visits the domain, DNS directs them to that server.
A Records are among the most common DNS records.
CNAME Records
A CNAME Record points one domain name to another domain name.
Example:
Instead of pointing directly to an IP address, it points to another hostname.
Many website platforms use CNAME records during setup.
MX Records
MX Records control email delivery.
Example:
They tell email services where incoming messages should be routed.
Without proper MX records, email may stop functioning correctly.
TXT Records
TXT Records store text-based information within DNS.
Common uses include:
Domain verification
Security validation
Email authentication
Third-party integrations
Many website and marketing tools require TXT records during setup.
Understanding Nameservers
Nameservers are responsible for managing DNS records.
Example:
When a domain uses specific nameservers, those servers become responsible for DNS management.
Changing nameservers effectively changes who controls the DNS records.
DNS Propagation
After DNS changes are made, updates do not appear instantly everywhere.
This process is known as DNS propagation.
During propagation:
Some users may see the old version
Others may see the new version
Changes gradually spread worldwide
Propagation can take anywhere from a few minutes to several hours.
Connecting a Domain to a Website
A typical website connection process looks like this:
Once DNS records are configured correctly, visitors can access the website through the domain name.
Common DNS Tasks
Website owners often work with DNS when:
Connecting a custom domain
Launching a new website
Setting up email
Verifying domain ownership
Configuring third-party tools
Migrating websites
Understanding basic DNS concepts makes these tasks much easier.
Common DNS Problems
Incorrect DNS Records
Even a small mistake can prevent a website from loading properly.
DNS Propagation Delays
Changes may appear inconsistent while updates spread across the internet.
Wrong Nameservers
Using incorrect nameservers can disconnect a domain from its website or email services.
Missing Verification Records
Some services require TXT records before activation or verification can be completed.
Accidental Record Deletion
Removing important DNS records can disrupt websites, email, and connected services.
Best Practices
Keep DNS Records Organized
Maintain clear documentation for important DNS settings.
Verify Changes Carefully
Double-check DNS values before saving updates.
Avoid Unnecessary Changes
Only modify records when necessary and understand their purpose first.
Allow Time for Propagation
Wait for updates to fully propagate before troubleshooting.
Keep Access Secure
Protect domain registrar and DNS accounts with strong passwords and two-factor authentication.
Frequently Asked Questions
What should I do before changing DNS settings?
Review existing records, document current configurations, and verify the values provided by your hosting or service provider.
Do I need to understand every DNS record type?
No. Most website owners only work with a handful of common records, such as A, CNAME, MX, and TXT records.
Can changing DNS affect my email?
Yes. Incorrect DNS changes can impact email delivery if MX records are modified or removed.
What's the difference between a domain registrar and DNS provider?
A registrar manages domain ownership, while a DNS provider manages the records that control where the domain points.
Why does my website still show the old version after changing DNS settings?
DNS updates can take time to propagate across the internet, causing different users to see different results temporarily.
framerbaseio